File dowloaded is corrupted

I see  that you opened a second post and to be honest I see no point in doing so.

Outside of that probably you have tested "modify /sys db tmm.http.passthru.invalid_content_length value enable" ?

Error Message: 011f0016:3: http_process_state_prepend - Invalid action:<code> Server sends too much data.

Interesting to review if you have ASM/AWAF features that need to check the full response body and to review the ASM logs as well.

(See the related links as well):

ASM/AWAF features that cause HTTP response accumulation

Check the ASM logs:

Configuring the BIG-IP ASM system to parse HTTP responses that are larger than 50 MB in length (11.x - 15.x)

You may also test stopping the ASM if needed when the file download URL is matched and just for "HTTP_RESPONSE" event as to not create big security hole.

example:

Bypassing ASM on HTTP response | DevCentral